Recommended cross section

The cross section of the supply system cables must be dimensioned based on the nominal line current Iline.

SEW-EURODRIVE suggests the following cable cross sections. These cable cross sections apply under the following conditions:

  • The conductors are made of copper with PVC insulation, operating temperature 70 °C.
  • The cables are routed according to IEC 60204-1 installation type C at an ambient temperature of 40 °C, accumulation 1.

MCR91A-….-5.3..

Unit

Size 7

1600

Nominal line current AC Iline

A

270

Supply system cable L1/L2/L3

mm2

240

Fuse miniature circuit breaker/motor circuit breaker

A

315

INFORMATION

Recommended cross section
The values are only recommendations. They are no substitute for detailed project planning of the cables depending on the concrete application and considering the applicable regulations.

INFORMATION

Securing the supply system cable
  • Secure the supply system cable with appropriate safety elements.
  • When selecting the supply system cable, make sure that the selected cross section is in the range of the connectable cross section of the terminals.
  • When selecting the line fuse, observe chapter Line fuses and miniature circuit breakers.

INFORMATION

Use of a residual current device
If using a residual current device is not mandatory according to the standards, SEW-EURODRIVE recommends not using a residual current device. Leakage currents caused by cable capacitances can lead to false tripping.